Drill-sharpening apparatus.



W. A. SMITH.

DRILL SHARPENING APPARATUS.

Q APPLICATION FILED FEB. 23, I9I6. 1,214,604.

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W. A. SMITH.

DRILL SHARPENI'NG APPARATUS. APPLICATION FILED FEB 23, 1916.

1,214,604. Patented Feb. 6,1917.

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DRILL SHARPENING APPARATUS.

APPLICATION FILED FEB. 23, L916.

Patented Feb. 6, 1917.

' vation and partially in section of the appaa depending block 9, coacting with ans r "WILLIAM A. SMITH, OE DENVER, COLORADO, ASSIGNO TO TEE DENVER Es-510K IDBILE WARE.

net aces.

Application filed February 2%,l916. Serial No. 89,0167.

Apparatus, of whichthe following is a specification;

The present invention relates to drill sharpening apparatus, and more particularly to that type employing expansive motive fluid under pressure, such as air.

One of the primary objects is to provide exceedingly simple, practicable apparatus of a novel character,

and' at the same time and which is relatively economical inthe amount of air used. I An embodiment of the invention that is at resent considered the preferable one, is

which is compact,

illustrated in the accompanying drawings,

wherein Figure l is a front view partially in eleratus. Fig. 2' is a rear view of the saine. Fig. 3 is a side elevation partly in section;

Fig. 4 is a detail cross sectional view on the line as of Fig. 1; Fig. 5 is a detail sectional view of the valve controlling the, sup-- ply of motive fluid to the shaping hammer. Fig. 6 is a vertical sectional view through the valve controlling the supply of motive fluid to the work clamping means.

Similar reference numerals designate corresponding parts in all drawings.

In the embodiment disclosed, a base 7 is employed which is hollow to provide an air chamber 8. On this base is located an anvil which is a head block 10 movable toward and from the same. These members are provided with the usual dies 11 and 12 for clamping the work in a manner well understood and they may also be provided with shaping dies 13 and 14.

The movable head block 10 is slidable upon a pair of spaced guide rods 15 extending upwardly from the base and passing through the anvil block 9, spacing sleeves 16 being located upon the guide rods and resting upon said anvil bloclg. the said guide rods is another fixed head block which includes a cylinder 17 having neck 18 provided with outstanding ears l9 that'are locatedupon the upper ends of-the guide rods, resting upon Specification of Letters Patent.

bracket 31 supporting a the figures of the r 29 below the pistons 30.

T he valve casing is Located above narLt-seaarnnnvs arranarns.

Patented i ch. d. the sleeves 16 and being held in place by suitable. nuts 20.v The cylinder it? has a lower integral. head 21 provided with openings 22 and has an upper removable head 23 secured in place by suitable screw bolts E24, said head having a central recess 25.

7 Operating in the cylinder 1? is a piston 26 of relatively great 'diarneter said piston having an upstanding central boss that enters the recess 25. r. piston rod .28, se cured at its upper end to the piston 26, slidably passes through the neclrlil, and is lined to the sliding head it Fe d o po site sides of the neck 18, are smaller cy 'n- .ders 29, the upper endsot Wlllfikfillfil r the large piston-chamber of the cylinder in these smaller cylinders 29 are located pistons 30 which bearagainst theunder side of the piston 26 and oppose its downward movement.

Mounted on thebase 'Z'is an outstanding I well known type Oi reciprocatory pneumatic hammer 32, which operates against a dolly33 mounted in a -bearing 3e and interposed. between. said harm mer and the Work clamping means.

Motive fluid supplied irons any suitahle source is conveyed to the apparatus through a pipe 35, one-branch 3d of which leafs to the cylinder 17, being connected thereto at one side or the recess 25, shown in Fig. 3. Another branch 37 has a hose connection 38 with the hammer 32, while a third branch 89 is in communication A conduit all, inthe turn cylinders check valve fluid-to the 'llhere dicated inl ig l connects 29. In the branch 3% is located a a1 that permits the passage oi cylinder 17, but prevents its return.

is also located in this branch 3% a valve casing 42 shown more particularly in Fig. 6. provided an upper inlet port 43 communicating with the branch 36, an outlet port it that leads the cylin der 17, and an exhaust port that is in communication with an exhan. 41 pipe 465 leading into the chamber 8 of hollow base 7. Slidably mounted in tlt ve cs5- ing as is a reciprocatory valve having spaced heads l8 and a depending stem that This stem is conthe cranl: 51 the in use and end.

the hranch extends below the casing. nected by a pitman with of a rock shaft 5'22 journaled in having a handle crank 53 at one Located at the lower end of with both cylii'zders' tit) pipe 37 a valve casing 54;, a detail of which is illustrated in 5. This casingaffords (f nlltltiull between the branch 37 and the hose 3i. and located therein is a valve seat with which cooperates an up avardly opening valve so. A. spring :37 bears against the valve to normally hold it in closed position, and a stem 58, depending from said valve, projects from the lower end of the casing and rests upon one end of a lever 5!) journaled. as shown at 30, upon the rear side oi? the base 7. The other end of this lever forked, as shown at 61, and the rock shat't is provided with a disk 62 having a pin (33 arranged to engage in the fork of the lever when the shaft is turned.

As already ckplained, theexhaust from the cylinder 17 passes into the chamber 8 in the hollow base 7. and a portion is allowed to escape through an opening 64: formed in the rear side Of said base. A portion of this exhaust also escapes through an upstanding nozzle (35 mounted upon the base and directing the discharge against the clamping and shaping, dies 11 and 12.

Briefly described, the operation of the struetun; is as follows: If the handle 53 is turned in one direction sufficiently, the valve t7 is lowered to permit the port 4 to be in con'nmmication with the exhaust port 45. (.onsequently, the air uiider the pistons 30 will raise the same. thereby elevating the piston ill and the head block 10. This upward movement is cushioned, however, by

the boss 27 of the piston .26 entering therhamber 25, and thereby trapping and compressing the air therein, so that a blow of the piston, against the cylinder head 23 is prevented. lVhen the head block 10 is thus elevated, the tool to be sharpened can be introduced bctwccn the head. block and anvil, and upon a return movement of the actuating handle, the valve 47 will first be raised, so as to brin; the supply port 43 of the valve asing 42 into c anmunication with the outlet port it. thereupon air will enter the cylinder 17 above the power piston 26, depressing the same against the action ol. the pis tons 3t). and causing the bit to be clamped. A further movement of the :urtuating handle as will cause the pin 3 to enter the forked end oi. oi the lever .31), and raise the rear end of :fill l lever, thereby opening the valve 36 and permitting the air to enter the hainmer 3;. The piston of this hammer will consequently be rapidly l'etzlfnlittatcd and the blows thereof will be transmitted by the dolly against the end of the bit. When a reverse rnovenu-nt ol' the piston takes place, the hannner 32 will be first stopped and afterward the supply of motive fluid to the \linder 17 will first be, cut oil and then exhaustial through the pipe 46 into the base of the u'iachine, a portion of this exhaust passing out through the opening (it,

the remainder will be directed by the nozzle or against the holding and shaping dies, blowing off any scale that may accumulate thereon.

From the foregoing, it is thought that the (.OllStI'llCtiOIl, operation and many advantapes of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape. proportion and minor details of construction may be resorted to without departint, from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a drill sharpener, the combination with a base having an anvil, of a movable head coacting with the anvil, a power cylinder supported above the anvil and head, a power piston ope 'ating in the cylinder and connected to the head, a return piston of smaller area than the power piston and located therebeneath, means for supplying motive fluid to the machine and conveying a portion to the power piston and a por-- tion to the' return piston and maintaining the same against the latten means for controlling the fluid supplied to the power piston and exhausting it therefrom, and a fluid operated shaping hammer and dolly mounted on the base.

2. in a drill sharpener, the combination with a base having an anvil, ot' a movable.

head roactiag with the anvil, a fixed head supported above the movable head and havinc an upper large piston chamber and a plurality oi lower and smaller piston chainbers communicating therewith, a power piston operating in the large piston chamber, return pistons in the smaller chamber. operatinq against the power piston, means for supplying motive [laid to the machine and conveying: a portion to the power piston chamber and a portion to the smaller piston chamber and maintaining the same in the latter, m ans for controlling the fluid supplied to the power piston chamber and exhausting it therefrom, and a. fluid operated shaping hammer and dolly mounted on the base.

3. In a drill shar]')ener, the combination with a base ha ving an anvil, of spaced guide rods fixed to the base and projecting above the anvil. a head block located between and slidable on the guide rods, a cylinder fixed to the guide rods above the head block, a, piston in the cylinder having; a depending ronnection with the. head block and located between the spaced guide rods, and a fluid operated shaping! hammer and dolly coacting with the anvil and h ad block.

n. in adrillsharpener,thccomhination with a base having an an il, of spaced guide rods fixed to'thel base' and projecting above the anvil, a head block slidably mounted on the guide rods, :1 cylinder having outstanding ears disposed below and in spaced relation thereto, said ears being secured to the guide rods, a "piston in the cylinder having a depending connection with the head block, and a fluid operated shaping hammer and dolly coacting with the anvil and head block.

In a drill sharpener, the combination with a base having an anvil, of spaced upstanding guide rods fixed upon the base, a head block slidablvniounted on the guide rods, a cylinder located above the guide rods and head block and having a depending neck and outstanding the latter being mounted upon the guide rode, a piston operating in the cylinder and having piston rod slidahle' in the neck and connected to the head block, and a fluid operated shaping hammer and dolly coacting with the anvil and head block.

(3. In a drill sharpener, the comlanation with work clamping,- means. of work shapingr means coactingr therewith, a motor for the clamping means. a motor for the work shaping means. motive fluid supply means connected to the motors. valves respectively controlling the supply means, 2111(. an oscillatory actuating device having a crank conncction with one valve. and a detachable connection with the other tor successively actuating said 'alves.

T. In a drill sharpener, the combination with a base, of work clamping means, a work shaping means mounted thereon, a motor for the clamping means, a motor for the work shaping: means. motive fluid supply means connected to the motors. valves respectively controlling the supply means, a

the clamping means. a motor for the work shaping n'ieans. a motive l'luid supply conduit ha viunbranches leading to the two mo tors. a check valve in the branch leading to the clamping motor for preventing; the

turn of the fluid tllerefrom to the shaping motor when looth are in. operation, controlling valves for the branches, and actuating means for the val es whereby they may be successively operated.

9. In a drill sharpener, the combination with work clamping means, of work shaping means enacting therewith, a, motor for the clamping: means, a motor for the shapi g; means. valves respee'ively controlling the supply, means, one of said valves having an. operati 'element, and an actuating; device connectee'l to one alve for operating the same and having; a detachable engagement with the operating element of the other valve to move it.

141 in a drill sharpener, the combination with a hollow base. of a work clamp mounted thereon and lllillltlllliff a movable men 1 her, a motor for actuating the movable member, including a cylinder and a piston operating; therein, means for supplying tive fluid to the motor. and exhausting it therefrom, means for directing the exhaust into the hollow hasc, said liaise having an outlet port. and a nozzle conneairted to the base for direction; a portion of the exoaust against the work clamping means.

11. In a drill sharpener, the combination with work clamping means. of a motor for actuating the same, means to): supplying fiuie to and exhausting it from the motor,

a valve controlling both the supply and exhaust of said motor. work shaping means coacting with the clamping means, a motor therefor. means for supplying motive fluid to the last named motor. a valve controlling said supply only to the last named motor. a common actuating device, means moved by the actuating device for operating the first mentioned valve to alternately permit the motive iiuid to he supplied to the motor of the work-clamydngg means and be exhausted 'Lln-rei'rom. and means also moved by the actuating device to permit motive fluid to he supplied to the motor of the work shaping means only when motive fluid is supplied to the motor oi the work clamping means.

In 'testin'iolrv whereof l allix my signature in the presence of two witnesses.

Witnesses:

.lnncs li. ltmiicxnonr. (fimumas it. it 1 sun. 

